Progressive Web Apps in Microsoft Edge and Windows 10
blogs.windows.com
blogs.windows.com
"In the next release of Windows 10, we intend to begin listing PWAs in the Microsoft Store... The Microsoft Store, powered by the Bing crawler, will automatically index selected quality Progressive Web Apps"
First, Microsoft is encouraging devs to build with web technologies instead of Windows APIs. This is exactly the future their anticompetitive actions in the 90s were trying to prevent.
Now, they're now treating the desktop like a browser and their Store like a search engine. They've lost the API wars [1] so thoroughly that they're now dedicated to working for the other side.
[1] https://www.joelonsoftware.com/2004/06/13/how-microsoft-lost...
Though I agree with your point that when the writing was on the wall, the pivot happened. Unfortunately, the reverse of that has been true as well. We had an issue with a vendor platform where we tested/developed everything in Chrome and it all worked fine. Then, as we're going live with this flip, we learn that the pagination is completely broken in IE9 and I believe IE10. Reason? Their pagination was appending extra elements (? or #, can't remember as it was about 3 years ago) which was against the standard (there could be only one). So in Google's saving you from yourself, they deviated from the standard which caused the platform to function incorrectly in another browser.
Let's also not forget their weaponizing of Google services when it comes to other platforms that aren't iOS (because splitting from that amount of marketshare would be ill advised).
I think this is the most interesting part. This is a great solution for App Stores because they are no longer gate keepers. Instead they become more like search engines by indexing content and providing a layer of metadata.
Google, for example, shows site that work well on mobile if you are searching on mobile.
Windows can now show sites that are "apps" if you are searching from the App Store.
Everyone gets the benefits of metadata such as comments, upvotes/stars, analytics, etc.